METHOD FOR BATTERY EQUALIZATION
4 Assignments
0 Petitions
Accused Products
Abstract
A battery equalization circuit is provided, including: a positive battery node connecting to a positive node of a battery cell in a battery circuit with a plurality of other battery cells; a negative battery node connected to a negative node of the battery cell; a transformer winding receiving an AC voltage, the transformer winding having an upper transformer node and a lower transformer node; an upper triac connected between the positive battery node and the upper transformer node; a lower triac connected between the negative battery node and the lower transformer node; a control circuit for controlling the upper triac and the lower triac based on a measured cell voltage between the positive battery node and the negative battery node, and a total battery voltage of the battery circuit; and an isolation element connected between the control circuit and a data bus.
10 Citations
33 Claims
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1-13. -13. (canceled)
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14. A method of equalizing a battery, including:
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measuring a total voltage of a battery containing N battery cells arranged in series with each other; determining an optimum cell voltage based on the measured total voltage and the value of N; measuring a selected cell voltage of a selected battery cell from the N battery cells; determining whether the measured cell voltage is less than the optimum cell voltage; connecting the selected battery cell to a voltage output of a generator during a portion of a positive cycle of the voltage output of the generator, when it is determined that the measured cell voltage is less than the optimum cell voltage; determining whether the measured cell voltage is greater than the optimum cell voltage; and connecting the selected battery cell to the voltage output of the generator during a negative cycle of the voltage output of the generator, when it is determined that the measured cell voltage is greater than the optimum cell voltage, where N is an integer greater than 1. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 33)
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23. A method of equalizing a plurality of battery cells by a battery equalization circuit, the method comprising:
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measuring a total voltage of the plurality of battery cells containing N battery cells, where N is an integer greater than 1; determining by a control circuit of the battery equalization circuit an optimum cell voltage based on the measured total voltage and the value of N; measuring a selected cell voltage of a selected battery cell from the plurality of battery cells; determining by the control circuit whether the measured cell voltage is less than or greater than the optimum cell voltage; if it is determined that that the measured cell voltage is less than the optimum cell voltage, connecting the selected battery cell to a voltage output of a generator during a portion of a positive cycle of the voltage output of the generator; if it is determined that that the measured cell voltage is greater than the optimum cell voltage, connecting the selected battery cell to the voltage output of a generator during a portion of a negative cycle of the voltage output of the generator. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification